dilate

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Related to dilates: constrict
References in classic literature ?
The tamest inhabitant of cities, the veriest spoiled child of civilization, feels his heart dilate and his pulse beat high on finding himself on horseback in the glorious wilderness; what then must be the excitement of one whose imagination had been stimulated by a residence on the frontier, and to whom the wilderness was a region of romance!
However, were the forty-four thousand eight hundred and forty-seven cubic feet of gas of which we speak, all introduced into the balloon, it would be entirely filled; but that would not do, because, as the balloon continued to mount into the more rarefied layers of the atmosphere, the gas within would dilate, and soon burst the cover containing it.
I will not dilate upon the feelings with which I left the old house, the well-known garden, the little village church--then doubly dear to me, because my father, who, for thirty years, had taught and prayed within its walls, lay slumbering now beneath its flags--and the old bare hills, delightful in their very desolation, with the narrow vales between, smiling in green wood and sparkling water--the house where I was born, the scene of all my early associations, the place where throughout life my earthly affections had been centred;--and left them to return no more
He studied the effects of adrenin on various parts of the body; he found that it causes the pupils to dilate, hairs to stand erect, blood vessels to be constricted, and so on.
Contractions come more and more frequently as the cervix dilates from around 3cm to fully dilated at 10cm.